Podesta allegedly fell for a phishing site that he put his password into, at least that is according to one email. It could have been Russian phishers.
He also lost his phone. Maybe the cabbie who found it was a Russian hacker.
Forgetting all that, how could the emails have been hacked? His email is firstname.lastname@example.org. Let’s see, what could his password be? Could it be johnpodesta? No? jpodesta? No, was it p@ssw0rd! Bingo!
I can see why they believed it would take the Kremlin to break through this gmail account.